The phrase 就要 jiùyào (= be about to) ....了le (= particle) which encloses a verb and a possible adverb, is used in order to express that an action is forthcoming very soon.
快要 kuàiyào (= soon) ....了 le (= particle) is equivalent.
他 | 就 | 要 | 来 | 了 | 。 |
tā | jiù | yào | lái | le | _ |
he | right now | want | come | particle | _ |
he, him, other | be about to | come, happen, connection-word | grammatical particle of time | 。 | |
He is about to come. |
他 | 快 | 要 | 来 | 了 | 。 |
tā | kuài | yào | lái | le | _ |
he | fast | want | come | particle | _ |
he, him, other | very soon | come, happen, connection-word | grammatical particle of time | 。 | |
He is coming soon. |